baber/WOPTO huggingface dataset:
Patent GB-1351589-A (GB)
Title: Multistage transistor amplifier for broad-band information signals
IPC: H03F1/32
Filed: 1973-03-14
Abstract: 1351589 Transistor amplifying circuits PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 14 March 1973 [17 March 1972] 12246/73 Heading H3T The invention relates to a transistor amplifier comprising a pre-amplifier stage 2 including a preamplifier output stage 7 with the output derived from its emitter circuit and applied to the base of a transistor 3 forming a driver stage for the final amplifier output stage 4 which is in common collector configuration, having its emitter circuit back-coupled-in the embodiment, by resistor 20-to the pre-amplifier stage 2, the back-coupling providing negative feedback. The invention is characterized in that a potential divider-in the embodiment comprising network 27 and resistor 26-is connected between the emitter circuits of transistors 7, 4, its division point 28 corresponding to a zero point for the input signal: a phase inverter stage 32 has its input coupled to the division point 28 and its output connected to provide negative feedback to the emitter circuit of the driver stage 3, which is in common emitter configuration. The arrangement provides a negative feedback loop via transistor 32 for distortion products produced in the transistors 3, 4. The network 27 comprises a resistor 34 and an inductor 33 to compensate for phaseshifts at higher frequencies due to the capacitances of transistors 3, 4. Alternatively, the emitter circuit of phase-inverter 32 may comprise a network 35 which increases in impedance at higher frequencies and so reduces the gain of transistor 32.
Patent GB-695832-A (GB)
Title: Improvements relating to suction cleaners
IPC: A47L5/34
Filed: 1951-05-25
Abstract: 695,832. Suction cleaners. HOOVER, Ltd. May 25, 1951 [June 10, 1950], No. 12264/51. Class 8 (i). In a suction cleaner of the hand propelled type wherein adjustment of a nozzle 11 from a normal operating height to a " high position is effected by a frame 25 biased away from the cleaner body 10 by a spring 32 and carrying rear wheels 21 and an abutment 43 arranged to be engaged by a latch lever 35 movable past a dead centre between engaged and disengaged positions, and having means e.g., a hook 38 holding the frame 25 against the spring 32 when the rear end of the cleaner body 10 is pressed down and the latch 35 is moved to its engaged position, a foot or hand operated lever arm 37 extends through a slot 39 and indicates to the user the position of the latch lever 35. The arm is held in either position by a spring 47 secured to a body lug 49, said spring passing over the lever pivot 36 as said lever moves from either position to the other. A frame lug 28 engages the undersurface of the body 10 to limit counterclockwise movement of the frame 25 about a pivot pin 26 and when in the " high position the lug 28 prevents insertion of a converter tool into a port provided therefor. Reference has been directed by the Comptroller to Specification 511,532.
Patent GB-640336-A (GB)
Title: Improvements in or relating to chairs, sofas or other seats
IPC: A47C7/46
Filed: 1948-05-05
Abstract: 640,336. Seats. AKERBLOM, B. V. May 5, 1948, No. 12371. [Class 52 (ii)] A chair or other seat is provided with a back having a part 3 supporting the lumbar region at least, the back being inclined rearwardly and being of forwardly bowed shape while the seat 5 is secured to the back at a height 4 less than the normal height of the occupant's knee bend, the seat sloping back towards the rear. A further support 2 may be provided for the pectoral region the central plane of which extends behind the plane of the lumbar support 3 as shown in Fig. 4.
Patent GB-474399-A (GB)
Title: Improvements in or relating to television or like receivers
IPC: H01J29/52
Filed: 1936-05-01
Abstract: 474,399. Television receivers. BAIRD TELEVISION, Ltd., and MERDLER, L. R. May 1, 1936, No. 12407. [Classes 39 (i) and 40 (iii)] The concentration or focus of an electronic beam for reconstituting the image is maintained constant whatever the level of the received signals. The beam is focused by the magnetic field due to a coil 1 in series with a valve 2, the grid potential of which is varied in accordance with the level of the signals. The mean current through the coil is adjusted by varying a resistance 3.
Patent GB-254463-A (GB)
Title: Improvements in domestic ranges or stoves
IPC: F24B1/182
Filed: 1925-05-13
Abstract: 254,463. Smith, S. May 13, 1925. Combined open fireplaces and cooking stoves; boilers, arrangement of. - In a combination range of the kind in which the gases pass beneath the boiler to a vertical flue between it and the side of the oven, the boiler is supported on a firebrick stool of a dish-like form having a recess with which the vertical flue communicates, and a second vertical flue is provided at the side of the oven and in communication with the fire. In the stove shown, the boiler l is supported on a stool 2 comprising a base with upstanding outer walls 4 and a wall 6 forming two passages 7, 8, the latter of which extends beneath the lower end of the vertical flue 3 passing up the side of the oven. In front of the flue 3 is a flue 12 by which the gases pass directly from the fire to the top of the oven and thence round a baffle 14 to the outlet. At the side of the grate is an opening 9, of which the passage 7 in the stool 2 forms an extension, by which the gases pass to the bottom oven flue 10 and up the outer flue 11 to the oven top flue.
Patent GB-1095871-A (GB)
Title: Process for the manufacture of compacted bodies of calcined magnesia
IPC: C01F5/08
Filed: 1965-03-24
Abstract: Semi-burnt magnesia compacts suitable for further processing into low-porosity refractories, are produced by firing magnesium hydroxide under a pressure sufficient and so applied as to maintain it in a compact shape, up to a sufficiently high temperature and for sufficient time to completely calcine it to magnesium oxide but to leave the latter substantially unsintered. The firing may be continued to a final temperature of 1000 DEG  C. and the compacting pressure 1-100 kg./cm2.  The compacting may be effected in that the mass being heated is kept under substantially constant pressure in a mould or in that the wax is heated while it is being extruded.  The magnesium hydroxide starting material may be admixed with up to 40% by weight based on the weight of the mixture of active or dead-burnt magnesia and also with a plasticizer, e.g. alkali metal salts such as sodium chloride and readily decomposable magnesium salts such as the chloride or sulphate.  The compacted shape may be that which it is desired to preserve in subsequent firing operations, e.g. conversion into dead-burnt magnesia and then to refractories. Alternatively, the compacts may be broken up into grog for further processing.
Patent GB-735935-A (GB)
Title: Improvements in or relating to bridges or other built-up structures
Inventor: DIGBY-SMITH RODMAN
IPC: E01D15/133
Filed: 1952-05-19
Abstract: 735,935. Bridges; girders; trusses. ENGINEERING & INDUSTRIAL EXPORTS, Ltd. June 10, 1953 [May 19, 1952], No. 12602/52. Classes 20 (1) and 20 (4). A built-in structure, e.g. for a bridge, comprises a triangulated framework constructed of junction elements 1 having angularly inclined faces 2 ... 4, 2<SP>1</SP> .... 4<SP>1</SP>, frame members comprising concrete sections 5 which abut the faces 2 ... 4<SP>1</SP>, and tension means, e.g. rods 6, which extend between the junction faces. The faces 2 ... 4<SP>1</SP> have holes to receive the rods 6, the holes being so disposed to permit the rods 6 to cross each other within the elements 1, tensioning means 6<SP>1</SP> being provided at the ends of the rods 6. Holes 1<SP>11</SP> in the side faces of the elements 1 receive tension members in pre-stressed concrete cross members 8 which support a pre-stressed concrete decking 7. The horizontal upper and lower members 5 are arranged in pairs side by side. Two or more frameworks in parallel side by side relation may be used, and a two-storey structure built, in which case the decking may be carried at the bottom, and a roof at the top.
Patent GB-935168-A (GB)
Title: Windshield wiper equipment
IPC: B60S1/34
Filed: 1962-04-04
Abstract: 935,168. Windscreen wipers. ANDERSON CO. April 4, 1962 [June 15, 1961], No. 12917/62. Class 138 (1). In a windscreen wiper the pivot between a first member, e.g. the head 26, mounted on the wiper shaft and having bearing means 40 therein and a second member, e.g. the wiper arm, having portions 30 positioned astride the first member 26, comprises a sleeve member 44 inserted in aligned apertures in the first and second members and adapted to be expanded at at least one end into contact with a portion 30 by a member 32. In the construction illustrated each end of the sleeve 44 is expanded by a pin 32.
Patent GB-548274-A (GB)
Title: Improved manufacture of sheet metal containers
IPC: B21D51/26
Filed: 1940-08-13
Abstract: 548,274. Making cans. CROWN CORK & SEAL CO., Inc. Aug. 13, 1940, No. 12940. Convention date, March 26. Drawings to Specification. [Class 83 (ii)] Cans of the kind having an integral conical top terminating in a neck having a closed bead or lip that forms a locking ring for receiving a closure are manufactured by a process that is continuous and automatic from the stamping out of the blank from strip steel to the final packaging for transport. The production line starts with means for uncoiling strip for the supply at a machine for blanking out shells which pass to the body forming machine lines squared and parallel. Each of these lines may end in a trimming machine beyond which the lines merge to a single flanging machine. A single combined trimming and flanging machine may be employed. After cleaning to remove lubricating oil used on the preliminary neck curling and in the cutting operation, the blanks pass through two curling machines and are then tested for pin holes, cracks and other flaws. The inside is sprayed for example with an aluminium paint and then the outside at the conical part and neck and the flanged bottom end that is tucked up during seaming on the bottom. The two sprayings may be combined in one machine. After drying and bottom seaming the complete container is tested for fluid tightness and coated material for the rest of the body is rubbed on and dried. This drying may take place in an upper tier of the previous drying oven. Printing in an air conditioned room with means for preventing the rollers being overheated is followed by drying, outside varnish spraying and further drying, these two dryings may also be in the same oven. Preheating for tinning is followed by spraying molten wax into the interior of the inverted cans, draining, wiping of the lip, rolling to distribute the wax evenly, standing on end to allow wax to settle in the bottom seam, and finally packing and carton sealing. In modifications the order of certain operations is varied. Specifications 488,628 and 544,040 are referred to.
Patent GB-1035833-A (GB)
Title: Improvements in filters
IPC: B01D39/18
Filed: 1963-04-03
Abstract: A filter for the treatment of gases, particularly tobacco smoke, to reduce their content of suspended solids and organic vapours is made from cellulose ester filaments having a pebbled surface.  The filaments are preferably wet-spun cellulose triacetate filaments which may be bonded to each other at their points of contact to form a cigarrette filter plug.  The plugs are made by plasticizing and wrapping, suitable plasticizers being triethyl citrate, dimethoxyethyl phthalate, methyl phthalylethyl glycollate, monoacetine, diacetin and triacetin.  Suitable filaments may be prepared by the process described in Specification 826,098.  A quantitive example is given.
Patent GB-581281-A (GB)
Title: Improvements in or relating to the polymerisation of vinyl esters of organic acids
IPC: C08F18/04
Filed: 1942-09-18
Abstract: Vinyl esters of organic acids alone or in admixture with another unsaturated compound which will polymerize therewith to form an interpolymer or heteropolymer are emulsified in an aqueous medium having a pH value between 5 and 8 and containing a dissolved salt of perdisulphuric acid and a dispersing agent consisting of an alkali metal salt of an alkyl sulphate or sulphonate containing 12 to 18 carbon atoms whose activity is unaffected at pH values between 3 and 5, and polymerized at a temperature between the freezing point of the emulsion and about 80 DEG  C. while a substantially oxygen-free atmosphere is maintained over the emulsion.  Polymers obtained by this process, especially interpolymers of vinyl acetate may be hydrolysed to give modified polyvinyl alcohols which, treated with aldehyde yield modified polyvinyl acetals.  The ratio of monomers to aqueous phase in the emulsion should be between 1 : 10 and 1 : 1. The mixture should be agitated during the reaction.  The pH value may be maintained by addition of a suitable buffer, e.g. monopotassium acid phosphate or sodium bicarbonate.  A suitable perdisulphate is the ammonium, sodium or potassium salt.  Its proportion varies from 0.1 to 10 per cent of the weight of monomer.  Suitable dispersing agents are dodecyl-1 acid sulphate, tetradecyl-1 acid sulphate octadecyl-1 acid sulphate, dodecane-1 sulphonic acid, tetradecane-1 sulphonic acid, hexadecane-1 sulphonic acid, octadecane-1 sulphonic acid, sodium cetyl sulphate, or an aliphatic sulphonate prepared by the sulphonation of paraffinic mineral oils.  The weight of active dispersing agent used is .2 to 5 per cent of the weight of the aqueous medium.  Air in the reaction vessel is displaced by nitrogen, methane or carbondioxide.  Examples describe the polymerization of vinyl acetate under various conditions of reaction.  Samples have been furnished under Sect. 2 (5) of a polymer of vinyl propionate and an interpolymer from vinyl acetate and vinyl chloride prepared according to the process of the invention.  Specification 578,767 is referred to.
Patent GB-132012-A (GB)
IPC: B64D27/00
Abstract: 132,012. Travers, J. L. Aug. 30, 1918. Propelling; steering.-The propellers of flying- boats are arranged so that they can be raised above the water-level when the boat is on water. Fig. 1 shows an engine A and propeller B mounted on a frame D pivoted at E and raised by means of links F, the lower ends of which are moved in slots G by means of cords O and worm-gear L.
Patent GB-509814-A (GB)
Title: Improvements relating to press button tuning mechanism for radio receivers
IPC: H03J5/12
Filed: 1938-05-04
Abstract: 509,814. Wireless receiving-apparatus. COLE, Ltd., E. K., and JARVIS, H. G. May 4, 1938, No. 13239. [Class 37] [Also in Group XL] Adjustable labels are provided for the push buttons of a wireless set, the labels 9 bearing the names of only those stations to which the associated button 5 can be assigned and being movable so that the appropriate station name is visible through window 8. The station selected by operation of the push-button can be tuned by adjustment of stem 7 and a suitable adjusting key can be clipped inside the protecting cover 2.
Patent GB-423476-A (GB)
Title: Improvements in and connected with checking devices for use with doors and for like purposes
IPC: E05F3/14
Filed: 1934-05-02
Abstract: 423,476. Door-checks. ADAMS, J. S., 3, Emerald Street, Bloomsbury, London. May 2, 1934, No. 13275. [Class 65 (i)] A door-check comprises a member with a number of cam surfaces arranged in succession peri. pherally and an assembly of radiallydisposed cylinders rotatable relatively to the said member, plungers being provided in the cylinders and pressed outwardly by springs to bear against the cam surfaces so that they are caused to slide in the cylinders when the two parts rotate relatively,fluid check ing means being alsc provided in connection with the cylinders. In the form shown, cylinders 4 are formed in a central member within an outer relatively rotatable member 1 having cam tracks 10 on its internal periphery. The members may be connected for rotation by the door by any suitable means, for example, as described in Specification 410,868. The cylinders contain plungers 7 with bearing balls 22 to engage the cam tracks, against which the plungers are pressed by springs 8. The inner ends of the cylinders communicate with a chamber 15 connected through a spring-pressed adjustable ball valve 18 and passages 12 with the chamber in member 1 containing the cylinders, which is filled with oil; on relative movement of the parts in one direction the cam tracks allow the plungers to move out of the cylinders, and the ball valve 18 allows oil to enter freely, but return movement causes the plungers to be pressed inwards, the flow of oil being then restricted by the valve, so that the movement is checked. In order to allow the use of a greater number of cylinders without restricting the angle of rotation of the parts, the member 1 may be provided with two sets of cam surfaces 10<a>, 10<b>, Fig. 4, and the inner member with correspondingly-placed plungers 7<a>, 7<b>.
Patent GB-324593-A (GB)
Title: Improvements in measuring pumps
IPC: G01F11/04
Filed: 1929-04-29
Abstract: 324,593. Rixen, C. J. April 29, 1929. Rope-actuated, single-acting bucket pumps.- A measuring pump, especially for inserting in the usual openings in oil drums, comprises a piston a moved bv an endless cord k on pulleys l all enclosed in the casing and operated by a handle o. One side of the cord passes through a packing in the piston or may be attached to a separate small piston q, Fig. 2, working in a tube p. Two such tubes, one on each side, may be provided for balancing the friction. The tube p may be outside the casing. In Fig. 4 the cord passes over a hand-rotated drum l, a thread n on the spindle being proportioned to cause axial movement of the drum to keep the pull of the cord vertical. Adjustable stops s<1> on casing and drum are provided.
Patent GB-1305105-A (GB)
IPC: B60Q1/46
Filed: 1970-03-19
Abstract: 1305105 Road traffic signals on vehicles ROBERT BOSCH GmbH 19 March 1970 [19 March 1969] 13315/70 Addition to 1185105 Heading G4Q [Also in Division H1] In a vehicle flashing unit including a pulse generator controlling an electromagnetic relay which supplies intermittent current to both directional and warning lights, and also including a pilot unit for altering the frequency of the pulse generator when a warning light fails to operate, the pulse generator, the relay and the pilot unit are mounted on one side of an insulating plate located in a housing together with the switch contacts and counter-contacts of the warning light switch. As shown in Fig. 1, a push-pull warning light switch comprises a switch stem 28 coupled to insulating plates 23, 33; the components of the flashing unit are mounted on plate 23; for switching, fingers 26 make contact with tracks 25. In Figs. 3, 4 (not shown) a push button switch has a hollow push button partially accommodating the insulating plate. Rocker switches are also described, Figs. 5-9 (not shown), in which (a) the insulating plate is pivoted in a housing and connected to the rocket by a switch rod; (b) the insulating plate is mounted inside the hollow rocker and contact fingers are mounted in a housing; and (c) the insulating plate is mounted in a housing and contact fingers are mounted in the rocker.
Patent GB-1331892-A (GB)
Title: Dibenzoxazepine n-carboxylic acid hydrazides and derivatives
IPC: C07D267/18
Filed: 1972-03-22
Abstract: 1331892 Dibenzoxazepine-N-carboxylic acid hydrazides G D SEARLE & CO 22 March 1972 [23 March 1971] 13339/72 Heading C2C Novel compounds of general Formula I in which Y are Y<SP>1</SP> are hydrogen, halogen, methyl or trifluoro methyl and R is C 7-12  alkanoyl, halo- C 1-6  alkanoyl, carboxy-C 1-6  alkanoyl, 3 - carboxyacryloyl, phenoxy-C 1-6  alkanoyl, halophenoxy-C 1-6  alkanoyl, C 1-6  alkyl sulphonyl or α-toluenesulphonyl are prepared by (1) reaction of a C 1-6  alkyl ester or acid halide of a Y,Y<SP>1</SP>-substituted 10,11-dihydrodibenz- [b,f][1,4]oxazepine - 10 - carboxylic acid with Q-NH-NH 2  in which Q is C 1-6  alkyl sulphonyl, α-toluene sulphonyl, carboxy acryloyl or C 7-12  alkanoyl or is a C 1-6  alkanoyl group substituted by halo, carboxy, phenoxy or chlorophenoxy or (2) by reaction of Y,Y<SP>1</SP>-10,11-dihydrobenz- [b,f][1,4]oxazepine - 10 - carboxylic acid hydrazide with Q-X in which X is hydroxy, halogen, -OC 1-6  alkyl or O-CO-Z (in which Z is -OC 1-6  alkyl or is connected to Q to form a cyclie anhydride). The reactions take place in the presence of an inorganic base such as sodium or potassium bicarbonate or a tertiary amine. Preferred compounds are 1-R-2-(8-chloro-10,11- dihydrodibenz[b,f][1,4]oxazepine - 10 - carbonyl) hydrazines in which R is octanoyl, heptanoyl, decanoyl, 5-chloropentanoyl or 4-chloro-butanoyl. Compounds of Formula I are antagonists of of prostaglandin, 5-hydroxy tryptamine and acetylcholine and are useful as topical antiinflammatory agents, anti-diarrheal agents and agents for reducing sebum secretion. 1-Octanoyl- 2 - (8 - chloro - 10,11 - dihydrobenz[b,f][1,4]- oxazepine - 10 - carbonyl) hydrazine forms with a carrier an anti-inflammatory composition for administration topically and a composition for inhibiting sebum secretion for administration parenterally.
Patent GB-102806-A (GB)
Title: Improvements in or relating to Railway Signalling Apparatus.
Inventor: RABADY NOWROJI DORABJI
IPC: B61L3/04
Filed: 1916-01-04
Abstract: 102,806. Rabady, N. D., and Dyson, W. H. Jan. 4, 1916. Wire and like compensators; rods and wires for operating signalling-apparatus; track apparatus actuating signals other than on trains.-A pawl m connected to the signal-operating mechanism is encaged by a rach m<1> connected to the wire o. When the signal is set to clear, the pawl m is engaged by a weighted lever s until a train depresses a pivoted lever so as to raise the end k thereof to engage a bracket r on the pawl m, which is thereby raised clear of the rack m<1>.
Patent GB-346192-A (GB)
Title: Improvements in or relating to trawl fishing nets
IPC: A01K75/06
Filed: 1930-05-01
Abstract: 346,192. Trawling-gear. CHESTERFIELD, F. C. P., 12, Remillo Avenue, Grimsby. May 1, 1930, No. 13481. [Class 48.] The cod end of a trawl net is protected by wooden blocks a with rounded or inclined forward ends a<1>. The blocks are secured to the net or to a supplementary piece of netting by lashings or staples d which pass through transverse holes in the blocks.
Patent GB-378081-A (GB)
Title: Improvements in or relating to step-by-step switches such as are used in automatic telephone systems
IPC: H01H63/20
Filed: 1931-05-07
Abstract: 378,081. Automatic exchange switches. STANDARD TELEPHONES & CABLES, Ltd., SMITH, C. P., and NEWTON, G., Columbia House, Aldwych, London. May 7, 1931, No. 13506. [Class 40 (iv).] The magnet armature of a step-by-step switch is mounted on a flat spring, or springs at right-angles to it. The armature 3 has its end divided into three tongues, the two outer tongues 4 being bent substantially at rightangles to the armature and fixed to two flat springs 5, whilst the central tongue 11 bears against the framework 1 to form a pivot. The restoring force is provided by a spring 20 mounted on a post 15, the tension of the spring being adjusted by nuts on the post whilst the nuts 18 form a back stop. Interrupter springs 13 are mounted on an extension 9 of the framework 1 and are operated by insulated stop 24, which is mounted on the adjustable extension 14 of the armature 3. Alternatively the armature end may have the two outer tongues forming the pivots and the central tongue turned up and fixed to a single flat spring.